1.80. grub

An updated grub package that adds two enhancements is now available for Red Hat Enterprise Linux 6.
The GRUB utility is responsible for booting the operating system kernel.
Enhancements
BZ#553741
Prior to this update, GRUB only supported the MD5 password encryption. This update introduces support for the SHA-2 cryptographic algorithms, allowing users to encrypt passwords using SHA-256 and SHA-512 hash functions as well.
BZ#654869
GRUB has been updated to allow booting from disk drives with 4KB sector size on UEFI systems.
All users of grub are advised to upgrade to this updated package, which adds these enhancements.
An updated grub package that fixes one bug is now available for Red Hat Enterprise Linux 6.
The GRUB utility is responsible for booting the operating system kernel.

Bug Fix

BZ#742976
An attempt to install GRUB on a CCISS device may have caused the grub-install utility to report the following error:
        expr: non-numeric argument
When this happened, grub-install failed to install GRUB on this device, but incorrectly reported success and returned a zero exit status. This update applies a patch that ensures that GRUB can now be successfully installed on such devices.
All users of grub are advised to upgrade to this updated package, which fixes this bug.